High-speed fence mesh dipping process requirements

High-speed fence mesh dipping process requirements

Highway fences are very extensive in today's era. In order to prolong the service life of products, the requirements in the manufacturing process of products are very strict. The following is an analysis of the production of our products over the years:
After the product is deoiled and preheated to the melting point of the powder coating, the plastic powder will adhere evenly after being immersed in the fluidized bed, and then the plastic cross-linked and leveled polymer steel-plastic composite product will be plasticized.
The principle of highway fences is as follows:
The powder impregnation originated from the fluidized bed method. The fluidized bed was first applied to the contact decomposition of petroleum on a Winkler gas generator, and a solid-gas two-phase contact process was developed, and gradually used for metal coating. Therefore, it is sometimes called "fluidized bed coating method". The actual process is to add powder coating into the bottom porous and gas-permeable container (flowing tank). Blower blows the treated compressed air from below to make the powder coating turn to flow. State." Become evenly distributed fine powder.
The fluidized bed is the second stage of the solid flow state (the first stage is the fixed bed stage, and the second stage is the gas flow transport stage). On the basis of the fixed bed, the flow rate (W) is further increased, and the bed begins to expand and loosen. The height of the bed began to increase, and each powder particle was floated, thus moving away from its original position for a certain degree of movement and then entering the fluidized bed stage.
The powder bed in the fluidized bed expands, and its height (I) increases with the increase of the gas velocity, but the pressure inside the bed (ΔP) does not increase, and the flow rate is varied within a certain range without affecting the required units of fluid. Power, which is the characteristic of the fluidized bed, is the use of this feature to carry out the painting process.
The uniformity of the fluidized state of the powder in the fluidized bed is the key to ensure uniform coating film. The fluidized bed used for powder coating belongs to “vertical fluidization”. The number of fluidizations must be determined through tests. Coating can be, the fluidized bed powder suspension rate up to 30 ~ 50%.